This mask in surfboard shape work was purchased in necessities.
It is possible to breathe in the two-hole 1 breathing than the hole in the dust mask is the speed of the work effortless fatigue also supposed to come out is a world of difference. Something Shape work in one hole mask and disposable mask If you think of something than the safety and what is better to stop because with the risk ......
Although previously had been cut by one hole, shaper of the United States and Australia in the shaper of study destination of the factory of Hawaii had to bring all this dust mask. This's dust mask in the performance of the terrible world of police US Army Navy and the Army Marine Corps of the US military specs acceptable product as one of the case, the mask also of this 3M in a few some dust mask will no doubt.

Repeat a third time.
It has been used in quite a frequency, but more than one year was available.
Filter has been replaced several times, but ...
However, it may be on the nature of the product problem,
Rubber in contact with the face will have deteriorated with age.
It will be torn off and pull in the final.
A feeling of use is very good.
It is no problem using the glasses (not to or cloudy)
If a little more cheaper, you Kaikae more frequently.

Confirmation in clogging also visually ventilation resistance filter effortless less breathing than other mask is likely to be ○.
× The band would immediately extend a delicate is.
We want to improve the band so that it can be mounted even from the top of the helmet.